personally I like the leapsters over the v-smile version. the games are educational, fun, and easy to learn. my children got them for Christmas last year at 4 and 3 and had no problem figuring out how to play the games on their own. they have also learned a ton from playing them. my dd knows tons of spanish because of dora and she is a master at spelling because of the leap frog games (and she is the younger of the 2). my son is a math wiz because of the star wars math game and reading because of clifford. i highly recommend those games.
either way i don't think that you could go wrong.